The `ENV key value` form can be ambiguous, for example, the following defines
a single env-variable (`ONE`) with value `"TWO= THREE=world"`:
ENV ONE TWO= THREE=world
While we cannot deprecate/remove that syntax (as it would break existing
Dockerfiles), we should reduce exposure of the format in our examples.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The `docker push` command up until [v0.9.1](https://github.com/moby/moby/blob/v0.9.1/api/client.go#L998)
always pushed all tags of a given image, so `docker push foo/bar` would push (e.g.)
all of `foo/bar:latest`, `foo:/bar:v1`, `foo/bar:v1.0.0`.
Pushing all tags of an image was not desirable in many case, so docker v0.10.0
enhanced `docker push` to optionally specify a tag to push (`docker push foo/bar:v1`)
(see https://github.com/moby/moby/issues/3411 and the pull request that implemented
this: https://github.com/moby/moby/pull/4948).
This behavior exists up until today, and is confusing, because unlike other commands,
`docker push` does not default to use the `:latest` tag when omitted, but instead
makes it push "all tags of the image"
For example, in the following situation;
```
docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
thajeztah/myimage latest b534869c81f0 41 hours ago 1.22MB
```
Running `docker push thajeztah/myimage` seemingly does the expected behavior (it
pushes `thajeztah/myimage:latest` to Docker Hub), however, it does not so for the
reason expected (`:latest` being the default tag), but because `:latest` happens
to be the only tag present for the `thajeztah/myimage` image.
If another tag exists for the image:
```
docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
thajeztah/myimage latest b534869c81f0 41 hours ago 1.22MB
thajeztah/myimage v1.0.0 b534869c81f0 41 hours ago 1.22MB
```
Running the same command (`docker push thajeztah/myimage`) will push _both_ images
to Docker Hub.
> Note that the behavior described above is currently not (clearly) documented;
> the `docker push` reference documentation (https://docs.docker.com/engine/reference/commandline/push/)
does not mention that omitting the tag will push all tags
This patch changes the default behavior, and if no tag is specified, `:latest` is
assumed. To push _all_ tags, a new flag (`-a` / `--all-tags`) is added, similar
to the flag that's present on `docker pull`.
With this change:
- `docker push myname/myimage` will be the equivalent of `docker push myname/myimage:latest`
- to push all images, the user needs to set a flag (`--all-tags`), so `docker push --all-tags myname/myimage:latest`
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The `docker image rm` command can be used not only
to remove images but also remove tags.
This update improves the documentation to make
this clear.
Signed-off-by: Filip Jareš <filipjares@gmail.com>
I am attempting to push a tag to a private repository. The documentation for `docker tag` has an explicit example to for how ["To push an image to a private registry"](https://docs.docker.com/engine/reference/commandline/tag/#tag-an-image-referenced-by-name). My colleague clarified that this command does not in fact push anything, so I thought this PR might save some future novice the same confusion.
Signed-off-by: Jake Lambert <jake.lambert@volusion.com>
The `docker daemon` subcommand was only present for
backward compatibility, but deprecated in v1.13,
and scheduled for removal in v17.12
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This does some minor fix-ups in the CLI reference
for "history", and copies the formattting section to
the man-pages.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The `reference` filter is documented in the file, but is not present
in the list of available filters.
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
- Use the word letter rather than character to refer to letters ;) when trying to specify that only letters and numbers can be used, and not ANY character...
- Small corrections
Fixes#29821
Signed-off-by: Timothy Hobbs <timothy@hobbs.cz>
Tianon Gravi
Charlotte Mach
Sebastiaan van Stijn
Filip Jareš
Jake Lambert
John Howard
Silvin Lubecki
taiji-tech
Vincent Demeester
Andrew McDonnell
Timothy Hobbs
Daniel Nephin